What is anaemia in rabbits?

Anaemia is a low red blood cell count or low haemoglobin. Red cells carry oxygen — without enough, rabbits become weak, breathe faster and may collapse.

What causes anaemia in rabbits?

Common causes include blood loss from fleas or mites (especially in young rabbits), gut bleeding, uterine disease in unspayed females, chronic disease, and bone marrow problems.

How do I know if my rabbit is anaemic?

Signs include pale gums and inner eyelids, weakness, lethargy, fast breathing, reduced appetite, and collapse. Pale gums in any rabbit need same-day vet assessment.

Can anaemia in rabbits be treated?

Yes — treatment depends on cause. Flea control, surgery for bleeding, blood transfusions in severe cases, and treating underlying disease. Early treatment improves survival.

Rabbit Health

Anaemia in Rabbits UK — Causes, Signs & Emergency Care

Published 25 June 2026Last updated 25 June 20263 min read

Quick answer

Anaemia is dangerously low red blood cells. Pale gums, weakness and fast breathing are emergency signs in rabbits. A common UK cause in young rabbits is flea or mite blood loss — but gut bleeding and uterine disease also occur. Phone your rabbit-savvy vet the same day.

What anaemia is

According to the RWAF and PDSA, anaemia means the blood cannot carry enough oxygen because there are too few red blood cells or too little haemoglobin. Rabbits hide illness well — anaemia may be advanced before owners notice.

Signs of anaemia in rabbits

Watch for:

Pale gums and inner eyelids — should be pink; white or very pale is urgent
Weakness — reluctance to hop, sitting hunched
Fast breathing at rest
Lethargy and reduced activity
Poor appetite — risks Rabbit gut stasis UK
Cold ears in severe cases
Collapse

Compare gum colour in good light. Any rabbit with pale gums needs same-day veterinary assessment.

Common causes in UK rabbits

External parasites (especially in kits)

Fleas and ear mites can drain blood over time. Young, small rabbits are especially vulnerable to life-threatening blood loss from heavy flea burdens. All rabbits in the household need appropriate parasite control — never use dog or cat products without veterinary advice.

Blood loss from internal bleeding

Gut ulcers or caecal disorders
Bladder or uterine bleeding
Trauma from fighting or accidents

Uterine disease

Unspayed females are at risk of uterine cancer and bleeding. Spaying is strongly recommended for health, not only pregnancy prevention.

Chronic disease

Long-standing Dental disease, kidney disease, or chronic infection can suppress red cell production.

Bone marrow disease

Less common but serious — may need referral and advanced diagnostics.

Emergency action

If your rabbit is weak, breathing fast, or has white or very pale gums:

Phone your rabbit-savvy vet immediately
Keep the rabbit warm and quiet
Do not force food if very weak — follow vet advice
Check other rabbits for fleas or shared illness

Anaemia can become fatal within hours in small rabbits with acute blood loss.

Diagnosis and treatment

Your vet may:

Examine gum colour and listen to the heart and lungs
Run blood tests (PCV/haematocrit) to confirm anaemia
Search for fleas, mites and external parasites
Use imaging (X-ray or ultrasound) if internal bleeding is suspected
Treat the underlying cause — flea treatment, surgery, antibiotics, etc.
Give blood transfusions or iron support in severe cases
Provide syringe feeding and gut motility support if not eating

Prevention

Neuter female rabbits to prevent uterine cancer
Use rabbit-safe flea control from your vet if needed
Keep hutches clean and check rabbits daily
Annual health checks with a rabbit-experienced vet
Feed unlimited hay — dental and gut health support overall wellbeing

Sources & further reading

Facts in this guide are rewritten in plain English from publicly available UK advice. We name the organisation where a specific point comes from their guidance. Links below go to the original pages — use them to read the source material directly.

PETHEALTH+ is independent. These organisations do not sponsor, approve, or partner with this website. Guidance checked against sources listed below (last updated 2026-06-25).

Related guides

Frequently Asked Questions

What is anaemia in rabbits?: Anaemia is a low red blood cell count or low haemoglobin. Red cells carry oxygen — without enough, rabbits become weak, breathe faster and may collapse.
What causes anaemia in rabbits?: Common causes include blood loss from fleas or mites (especially in young rabbits), gut bleeding, uterine disease in unspayed females, chronic disease, and bone marrow problems.
How do I know if my rabbit is anaemic?: Signs include pale gums and inner eyelids, weakness, lethargy, fast breathing, reduced appetite, and collapse. Pale gums in any rabbit need same-day vet assessment.
Can anaemia in rabbits be treated?: Yes — treatment depends on cause. Flea control, surgery for bleeding, blood transfusions in severe cases, and treating underlying disease. Early treatment improves survival.